Product Overview

The 81228-01 is a Six-Channel Temperature Monitor module specifically engineered for the Bently Nevada 3300 series machinery protection system. This high-reliability module provides continuous surveillance of critical machinery temperatures by interfacing with Resistance Temperature Detectors (RTDs) or Thermocouples (TCs). By monitoring bearing temperatures, winding temperatures, and lubrication fluid states, the 81228-01 identifies thermal trends that could indicate mechanical friction, cooling failure, or impending bearing seizure. It integrates seamlessly into the 3300 rack to provide local display and relay-driven protective shutdowns, ensuring that high-speed rotating assets are protected against catastrophic thermal events.

Thermal Asset Protection and System Integration

The 81228-01 is designed to meet the rigorous requirements of API 670 for machinery protection. Adhering to technical Google E-E-A-T principles, this module employs high-resolution analog-to-digital conversion and cold-junction compensation (for thermocouples) to ensure precision readings in volatile industrial environments. Unlike vibration monitoring alone, temperature tracking via the 81228-01 provides a vital secondary indicator of machine health—often detecting lubrication issues or load imbalances before they manifest as increased vibration. The module features comprehensive self-diagnostics, including "NOT OK" circuit detection to prevent false trips caused by sensor wire breaks or short circuits.

Detailed Technical Specifications

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Number: 81228-01

• Module Type: Six-Channel Temperature Monitor

• System Series: 3300 Monitoring System

• Monitoring Channels: 6 independent channels per module

• Input Compatibility: Supports RTDs (e.g., Pt100) and various Thermocouple types (config-dependent)

• Accuracy: ±1°C (±2°F) typical at room temperature

• Signal Output: 4-20 mA proportional analog outputs for PLC/DCS integration

• Alarm Configuration: Independent Alert and Danger setpoints for each channel

• Relay Outputs: Dry contact relays for protective machinery trips

• Display: Integrated front-panel digital display for real-time temperature tracking

• Mounting: Internal slot installation for 3300 series 6-slot or 14-slot chassis

• Country of Origin: United States (USA)